2013 AUDI A7 relay

Trailer towing Driving with a trailer
General information
Your Audi was designed primarily for passen­
ger transportation .
If you plan to tow a tra iler, p lease remember
that the addit ional load will affect durab ility,
economy and performance .
Trailer towing not on ly places more stress on
the vehicle, it also calls for more concentra­
tion from the driver.
F or this reason, a lways fo llow the operating
and driving instructions provided and use
common sense.
(D Note
If you are going to tow a trai ler, you must
ac tivate the trailer operation mode
c::> page 209, Operating instructions.
Technical requirements
Traile r hitch
Use a weig ht-carrying hitch conforming to the
gross trailer we ight. The hitch must be suita­
b le for your veh icle and trailer and must be
mounted securely on t he ve hicle's chassis at a
technically sound location . Use only a trail er
hi tch w ith a removab le ball moun t. A lways
check wi th t he tra ile r hi tch man ufa ctur er to
make sure that you are using the cor rect
h itch.
Do not us e a bumper hitch .
The hitch m ust be installed in such a way that
i t does not interfe re with the impac t-absorb­
i ng bumper syst em. No mod ificat ions should
b e made to the vehi cle e xhaus t and br ake sys­
tems . From t ime to time, check th at a ll hitc h
mo unt ing bo lts rem ain securely fas tened.
When you are not towing a trail er, remove the
tra ile r hi tch ball moun t. T h is prevents the
hi tch from causing damage sho uld your ve hi­
cle be str uck from behind~ .&.
Trailer towin g 209
Trailer brakes
If your trailer is equippe d wi th a bra king sys­
tem, check to be s ure that i t conforms to all
regulations .
T he trailer hyd ra u lic bra ke sys tem mus t not be
d irec tly connec ted to the vehicle's hydraulic
brake system .
Safety chains
Always use safety chains be tween your ve hicle
and t he tra ile r.
Trailer lights
Trai ler lights must meet all reg ulations. Be
su re to c heck with your Audi dea ler for correct
wir ing, switches and relays .
Mirrors
If you a re unable to see the traffic behind you
u sing the regula r outside mirrors, then you
must insta ll extended mir rors. It is important
t h at you
always have clea r vis io n to the rear.
_&. WARNING
-
Afte r removi ng the trailer hitch , do no t
s tor e i t in yo ur v ehicl e. In case of sudden
b raki ng, the hi tch co uld fly forwar d and in­
j ur e you o r yo ur pass enge rs.
Operating instructions
Maximum trailer weight
A tra ile r fo r you r vehi cle is l imited to a typi cal
cla ss 1 o r class 2 tr ailer.
Trailer load distribution
Be sure the load in the tra ile r is held secure ly
in place to p revent it from shift ing fo rward,
ba ckward or sideways.
Never allow a passenger to ride in a trailer
c::> .& in Driving instructions on page 211 .
Engine cooling sy stem
Towing a t railer ma kes the engine wor k hard­
er . It is impo rtant that the cooling system's
performance is up to the additional load.
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24 4 Ch eck ing and filling
Never use a fast charger as a booster to
start the engine. This will seriously dam­
age sensitive electronic components, such
as control units, relays, rad io, etc., as well
as the battery charger.
Battery replacement
The new battery must have the same specifi­
cations and dimensions as the original equip­
ment battery .
Intelligent energy management in your veh i­
cle is respons ible for d istributing the electr i­
cal energy throughout your vehicle
c::> page 202. The intell igent energy manage­
ment system w ill keep the engine battery
cha rged bette r than vehicles w ithout t his sys­
tem. To make sure the additional e lectrica l en­
e rgy is availab le once again after you have
changed the battery, we recommend that you
install batteries of the same type and man u­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the battery hous ing. Your
author ized dealer must code the battery in
the energy management system to enable you
to use the energy management funct ions cor­
rectly after replac ing the battery .
The new battery must have the same capacity ,
voltage (12-volts), amperage, const ruct ion
and p lug sealing.
When insta lling the battery, make sure the ig­
n ition and all e lectr ica l consumers are sw itch ­
ed off .
{[) Note
Make sure the venti lation hose on the s ide
of the battery is connected, ot herwise
fumes or battery ac id can leak out.
- Vehicles with the Start-Stop-System* are
equipped with a special cycle-proof AGM
batte ry. Insta lling a differe nt type of
batte ry can ca use p rob lems in the vehi­
cle elect rical system. When rep lacing the
vehicle bat tery, always ins ta ll one wi th the same specifica
tions as the o rigina l
battery .
~ For the sake of the env ironment
B ec ause o f th e p rob lem of p roper disposal
of a battery, we recommend your author­
ized Audi dealer change the battery fo r
you. Batteries contain sul fur ic acid and
l ead and must always be disposed of prop­
erly in compl iance with all environmental
regulations. Disposing of veh icle batter ies
i mproperly is very dange rous to the envi­
r onment.
Windshield/headlight
washer container
Fi g. 195 Eng in e compa rt m ent: cove r on t he w inds hield
and head lig ht* was her flu id reservo ir
T he washer fluid co nta iner is mar ked w ith the
symbol$ on its cap
c::> fig. 195, c::> fig. 189.
.,. Before yo u check anything in the engine
compa rtment,
alwa ys read and heed all
WARNINGS
c::> A in Working in the engine
compartment on page 230 .
.. Lift the fi ller cap tongue to add washer flu­
id . You can fi ll the containe r to the top .
.. Press the cap back onto the filler neck after
filling the container .
You can find the reservoi r
capacity in the table
in
c::> page 287.
C lean water should be used when filling up . If
possible, use soft water to prevent scaling on
washe r jets. Always add a g lass cleaner so lu­
t ion (with frost protection in the winter).

Emergency situations
General
This chapter i s intended for trained emer­
gency crews and working personnel who have the necessary tools and equipment to
perform these operations.
Starting by pushing or
towing
CD Note
Ve hicles w ith an au tomatic tra nsmission
cannot be started by pus hing o r tow ing.
Starting with jumper
cables
If necessary, the engine can be started by
connecting it to the battery of another vehi­
cle.
If the engine shou ld fail to start because of a
discha rged o r wea k battery, the battery can be
connected to the battery o f
another vehicle,
using a
pair of jumper cables to start the en­
g ine.
Jumper cables
Use only jumper cables of sufficiently la rge
c ross section to carry the starter c urrent safe­
l y. Refer to the man ufacturer's specifications.
Use only jumper cables with
insulated te rm i­
na l clamps wh ic h are d istinctly marked:
plus(+) cable i n mos t cases co lore d red
minu s(-) cable
in most cases colored black .
A WARNING
Batterie s contain e lec tricity, ac id, an d gas.
A ny of these can cause ve ry ser io us or fatal
inju ry. Follow the instructions below f or
safe han dling of your veh icle's b attery .
- Alway s shield you r eyes and avoid lean­
ing over the bat te ry whenever possib le.
- A dis ch arged battery c an free ze at tem­
peratures ju st be low 3 2 °F ( 0 °C ). Befo re
Emergency situations 2 79
connecting a jumpe r cab le, you must
thaw the fr ozen battery c omp lete ly, ot h­
erwise it could explode.
- Do not allow battery acid to contact eyes
or skin. Fl ush any contacted area with
wate r immediately.
- Improper use of a booster battery to start a vehicle may cause an explosion.
- Vehicle batter ies genera te exp losive gas­
es. Keep spar ks, flame and lighted c iga ­
rettes away from batte ries.
- Do not try to jump start any ve hicle w ith
a low ac id leve l in the battery.
- The vo ltage of the booste r batte ry m ust
a lso have a 12-volt rating. The capacity
(Ah) of the booster battery sho uld not be
lowe r tha n that of the discharged bat­
tery . U se of batte rie s of d iffe ren t voltage
or substantially diffe rent "Ah" rat ing
may c au se an exp losion and persona l in­
JU ry.
- N ever cha rge a fro zen batte ry. Gas tr ap­
pe d in t he ice may c ause an explosion.
- Never cha rge or use a batte ry tha t h as
been fr ozen. T he battery case may have
be weakened.
- Us e of b atter ies of differe nt voltage or
sub stant ia lly diff eren t ca pa city (Ah) ra t­
i ng may c ause an ex plosion an d injury .
Th e capac ity (Ah) of the booster bat tery
should not be l ower than that of the dis ­
charged batte ry .
- Before you chec k any thing in the engine
compa rtment, always read an d hee d all
WARNINGS¢
page 224, Engine com­
partment.
CD Note
- App lying a higher voltage booster ba t­
tery will cause expens ive damage to se n­
sit ive e lectronic components, such as
cont rol units, relays, rad io , etc.
- The re must be no electrical contact be­
tween the vehicles as otherwise current
cou ld already start to f low as soon as the
posit ive(+) te rm inals a re c onnected. ..,. •
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